Pulverizer.



UNITED STATES PATENT OFFICE.

WILLIAM M. ERNST, OF NEW YORK, N. Y., ASSIGNOR, RY MESNE ASSIGN- MENTS, TO THE PHOENIX INVESTMENT COMPANY, OF DELAWARE.

PU LVERIZER.

SPECIFICATION forming part of Letters Patent No. 661.796. dated NOVembe1 1 1 Application filed September 23, 1897. Serial No. 652,721. (No modelfi To a /7/0772, it may concern.

Be itknown that I, WILLIAM M. ERNST, a citizen of the United States, residing in New York city, county and State of New York,have invented certain new and useful Improvemerits in Pulverizers, of which the following is a specification. i

My invention relates to improvements in the class of pulverizers wherein a series of rotative bat-s or heaters are carried within a suitahle casing and adapted to engage material to reduce it-to a fine condition; but in this class of pulverizersas known to me, the larger particles ofmaterial are liable to pass to or near the center of the casingand to be drawn therethrough and passed therefrom without being reduced to'as fine a condition as desired.

The object therefore of my inventionis to construct and arrange the hats or heaters in such manner that theywill act to keep the larger particles'of material in suspense withi n the casing, so as to assure that they will he reduced to a fine condition before being delivered from the casing.

In carrying out my invention I provide a casing and a rotative shaft therein, and to edges of these hats are located near the surface of the casing. I also by preference secure to said shaft another series of hats or heaters, that are located nearer the shaft than the hats or heaters first mentioned, and these inner hats or heaters have lips or wehs at opposite ends projecting from the working face thereof and in the'direction of movement of hats, and said hats or heaters also have a lip or web at the outer edge, which also projects in the direction of movement of the hats. These lips or wehs serve to retard the larger particles of material from being thrown outwardly to prevent said particles from passing from the casing until they are reduced to a sufiiciently fine condition.

The invention also consists in the novel details of improvement and the combinations of parts that Will he more fully hereinafter set forth, and then pointed out in the claims.

Reference is to behad to the accompanying drawings, forming part hereof, wherein-- Figure l is a vertical longitudinal section through a pulverizer embodying my invention. Fig. 2 is a vertical cross-section thereof. Fig. 3 is a perspective view of the hat or heater that lies near the inner surface of the casing. Fig. Us a similar view of one of the inner hats or heaters, and Fig. 5 is a vertical section thereof.

In the accompanying drawings, in which similar numerals of reference indicate corresponding parts in the several views, 1 indicates asuitahle casing, within which is journaled a shaft 2, which may be suitably rotated. An inlet-opening 5 may be supplied with material tohe pulverized in any suitahle manner.

6 is an outleteopening at the opposite end of the casing. Any suit-able feeding mechanism may he provided for properly feeding the material to he pulverized to the pulverizer.

8 is a series of arms carried by shaft 2 and projecting radially therefrom Within casing 1, and these arms carry hats or heaters 9 9, the outer edges of which hats lie near the inner surface of easing 1. These bats 9 are arranged in annular series, there being any desired number in each series, and the series 9 of such hats, which is the series adjacent to the outlet 6 of easing 1, are turned at an angle to the shaft 2, so as to create an outward draftto force air and pulverized material through the outlet 6. (See Figs. 1 and 2.) The hats H at one or both ends have a lip or web 9, that projects outwardly from the face of the hat in the direction of its movement. The hats 9 are shown in the form of plates attached to the arms 8. In Fig. l I have shown the lips 9 on the hats 9 as alternating at the ends of the hat-s-that is to say, the lip 9* projects from, say, the left-hand end of one hat and from the righthand end of the hats in the next adjacent annular series; but the relative location of these lips may be altered as desired.

10 is another set of arms carried by the shaft 2 and radially disposed thereon, which arms are shorter than the arms 8 and arranged in series around the shaft, there being any desired number of said arms in each series. 'The arms 10 are shown as alternating in position between the arms 8.

11 represents bats or heaters carried by the arms 10 and nearer to the shaft 2 than the bats 9. The bats 11 at each end have lips or webs 11*, that project from the face thereof in the direction of motion of said bats, and 11 is a lip carried by each bat 11 at the outer edge thereof, the lip 11 projecting in the same direction as the lips 11 spaces being formed between the adjacent ends of the lips 11 11 for the escape of material from the faces of the bats.

I have shown a series of bats 11 located between the inlet-opening 5 of casing 1 and the first series of hats 9, whereby as the heavy particles of material first enter the casing they will encounter the inner hats 11; but, if preferred, the outer hats 9 may be placed adjacent to the inlet-opening 5.

With the arrangement of'bats above described the material that enters the casing 1 will be struck by said hats and will be tossed about within the casing to pulverize the same, and the lips 9 will tend to keep the particles of material that engage saidbats from slipping from the ends thereof too soon, or, in

other words, will retard the passage of the material through the casing, so as to keep said material in the presence of the bats until it is reduced to a sufficiently fine condition to enable it to be drawn along by the air carried within the casing.

11, and the lips 11 thereof will tend to prevent the passage of these heavy particles lengthwise of the casing, so as to keep them in the presence of said hats to reduce them to a finer condition, while the lips 11 act to hold said particles in contact that are in contact with the bats,- while the finer particles of material may slip from the bats through the spaces at the adjacent edges of the lips 11 11. described the lips or webs 9? and 11 form a sort of rotary wall within the casing in line with the bats, whereby the material to he pulverized will be retarded in its passage through the casing, so as to prevent large particles from being passed from the casing, owing to the fact that the weight and momentum of the larger particles are greater in proportion The heavier particles of material will he caught by the bats By means of the arrangement of bats to their superficial area, whereby a more uniform pulverizing of the material may be effected. I

A pulverizer of the character described may be used to pulverize fuel and to force such pulverized fuel into a combustionchamher for the purpose of burning it in the form of a flame.

r I do not limit my invention to the precise details of construction shown and described, as they maybe varied without departing from the spirit of my invention.

Having now described my invention, what I claim iS 1. A pulverizer comprising a casing having an inlet and an outlet, a rotative shaft therein, and a series of batsor heaters carried by said shaft and provided with a lip or web at one end that projects at an angle to the face of the hat or heater and in the direction of rotationof the latter adapted to ohstructthe passage of larger particles of material longitudinally through the casing, substantially as described.

2. A pulverizer comprising a casing having an inlet and an outlet, a rotative shaft therein, radial arms carried by said shaft, certain of said arms being longer than theothers, hats or heaters carried by the long arms and having a lip or web at one end that extends substantially at right angles to the axis of the shaft, and bats or heaters carried by the short arms, substantially as described.

3. Apulverizer comprising a casing having an inlet and an outlet, a rotative shaft therein, radial arms carried by said shaft, certain of said arms being longer than others, hats or heaters carriedjhy the long arms and having a lip or web at one end projecting in the direction of rotation of the hats or heaters, and bats or heaters carried by the shorter arms and having a lip or web at their ends and a lip at the outer edge, substantially as described.

4. A pulverizer comprising a casing having an inlet and an outlet, a rotative shaft therein, bats or heaters carried by said. shaft, said bats or heaters having a lip or web at the ends and a lip or web at the outer edge, a space being provided between the ends of the adjacent lips or webs, substantially as described.

WM. M. ERNST.

Witnesses:

T. F. BOURNE, F. E. TURNER. 

